Drawing portfolio



April 28, 1936. F. J. BENTZ 2,039,207

DRAW ING PORTFOLI 0 Filed March 50, 1935 awvewboz Patented Apr. 28, 1936 UNITED STATES PATENT OFFICE 3 Claims.

The invention aims to provide a new and improved drawing portfolio which, when closed, serves effectively as carrying and protecting means for drawing paper, chart sheets, and drawing equipment such as angle and square, and when opened serves effectively as a drawing board.

Another object of the invention is to provide new and improved means for securing the drawing paper to the board without the use of thumb tacks, metal clips and the like.

With the foregoing in View, the invention resides in the novel subject matter hereinafter described and. claimed, description .being accomplished by reference to the accompanying drawing.

Fig. l is a perspective View showing the portfolio in open position.

Fig. 2 is a perspective view showing the device closed.

Fig. 3 is a detail sectional view on line 3-3 of Fig. 1 showing the preferred means for securing the drawing paper to the board.

Fig. 4 is a fragmentary perspective view showing another way in which the paper may be secured to the board.

In the drawing above briefly described, the numeral 5 denotes a fiat rectangular plate formed from aluminum or other desired material. The inner side of this plate is provided along two of its adjacent edges with straight-edges 6 and 1 which may be fixedly joined to said plate in any suitable way. These straight-edges preferably bear units of measurement as shown.

A second rectangular plate 8 of aluminum or other desired material, is hinged at 9 to a third edge of the plate 5, so that said plate 8 may open into the same plane with said plate 5 as shown in Fig. 1, or may close upon the straight-edges 6 and 1, being then spaced from and parallel with the plate 5. An edge of the plate 8 is provided with means H preferably in the form of a flange, to establish a barrier along the fourth edge I2 of the plate 5 when the portfolio is closed as seen in Fig. 2. Thus, drawing paper or the like l3 and drawing equipment such as square l4 and angle l5, may be carried safely in the closed portfolio, being held against sliding therefrom by the hinges 9, the straight-edges 6 and l and the flange or the like I I.

When the portfolio is opened and a sheet of paper l3 secured upon the plate 5, drawing may be conveniently accomplished and due to location of the flange or the like H on the plate l3, it will not interfere with movement of square and angle as if it were located along the edge I2 of the plate 5. However, in case it is necessary to use a wider or longer sheet of paper, it may well extend onto the plate 8.

I provide adhesive means for securing the 5 paper in position to prevent slipping thereof. In Figs. 1 and 3, the plate 5 is provided with shallow upwardly open sockets I6 filled with an adhesive cement l1, said cement being of a nature which will stick sufficiently to the paper to hold it in 10 place, yet will allow the paper to be stripped off without pulling the cement partially or totally from the sockets. The upper sides of the cement inserts I! are flush with the upper side of the plate 5 so that no wrinkling of the paper is 5 caused when it is downwardly pressed onto these adhesive portions.

If desired, strips of adhesive'tape l8 may be secured upon the plate 5 as seen in Fig. 4, instead of using the adhesive inserts I! for paper anchor- 20 age purposes.

It will be seen from the foregoing that novel and advantageous provision has been made'for carrying out the objects of the invention, and while the details disclosed are preferred, vari- 25 ations may of course be made.

Any suitable latch I9 may be employed for holding the portfolio closed.

I claim:-

1. A drawing board and portfolio comprising 30 a rectangular plate, fixed straight-edges at the upper side of said plate and extending along two adjacent edges of said plate, a second rectangular plate hinged to a third edge of the first mentioned plate to swing open into the same plane 35 with said first mentioned plate, said second plate being closable onto said straight-edges into spaced parallel relation with said first mentioned plate, and means on an edge of said second plate to form a barrier at the fourth edge of said first mentioned plate when said second plate is closed onto said straight-edges, whereby papers and drawing equipment may be carried and retained between the two plates when the portfolio is closed.

2. A drawing board and portfolio comprising a rectangular plate, fixed straight-edges at the upper side of said plate and extending along two adjacent edges of said plate, a second rectangular plate hinged to a third edge of the first mentioned plate to swing open into the same plane with said first mentioned plate, said second plate being closable onto said straight-edges into spaced parallel relation with said first mentioned plate, and a fiange along an edge of said second plate to form a barrier at the fourth edge of said first mentioned plate when said second plate is closed onto said straight-edges, whereby papers and drawing equipment may be carried and retained between the two plates when the portfolio is closed.

3. A drawing board having an upwardly open socket filled with an adhesive substance for removably securing the drawing paper to the board, the upper faces of said board and said adhesive substance being flush.

FRANK J. BENTZ. 

